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ACTFLEX BIOSET pack
● TDS-BIOSET · Rev 3 · 11 November 2026

ACTFLEX BIOSET Tile adhesive

Polymer-modified cementitious tile adhesive, C2TE S1

Direct-stick tile adhesive tested over ACTFLEX 989 CWP and 906 WPU. No primer, no slip layer.

C2TE S1Grout from 24 h20 kg bag
C2TE S1Class
2.194 N/mm²Adhesion
3.270 mmDeformation
5.0–5.5 LWater
≥ 30 minOpen time
Up to 3 hPot life
TDS ↓SDS ↓Reports (4)Send us your job →Where to buy →
● Explainer

How ACTFLEX BIOSET goes on

● The numbers

ACTFLEX BIOSET coverage, coats and cure times

Polymer-modified cementitious adhesive for ceramic, porcelain, vitrified tile and most natural stone, inside and out. Supplied in 20 kg bags and mixed with clean water only.

Class
C2TE S1typicalC2 and S1 certified; T and E are FORSPEC R&D results · TDS p2
Adhesion
2.194 N/mm²initial tensile adhesion, Report 571-2 · TDS p2
Deformation
3.270 mmtransverse, S1 range is 2.5–5 mm · TDS p2
Water
5.0–5.5 Lclean water per 20 kg bag · TDS p2
Open time
≥ 30 mintypicaladjustment time 5–15 minutes · TDS p2
Pot life
Up to 3 htypicalas tested at 23°C and 50% RH · TDS p2
Grout from
24 hlight foot traffic also from 24 hours · TDS p2
Full service
72 hat 25°C and 50% RH · TDS p1
Coverage
6–7 m²typicalper 20 kg bag with a 6 mm notch trowel · TDS p3

From the FORSPEC data sheet, TDS-BIOSET · Revision 3 · 11 November 2026. Times are at 25°C and 50% relative humidity unless the data sheet says otherwise. Typical = FORSPEC’s own typical value, not a laboratory-certified one.

● Is it right for the job

Where ACTFLEX BIOSET is used

Use it for

  • Direct-stick tiling over cured ACTFLEX 989 CWP, 988 CWP and 906 WPU
  • Internal and external floors and walls over concrete and screeds
  • Ceramic, porcelain, vitrified tile and most natural stone
  • Plasterboard, fibre-cement and compressed fibre-cement substrates
  • Wet areas and external work at 100% coverage with back-buttering

Know before you start

  • Not for continuous immersion such as swimming pools and tanks
  • Not for metal, timber floors or substrates that keep moving
  • Not for floors deflecting more than span ÷ 500
  • Never below 5°C or above 35°C, and never into skinned adhesive

Its FORSPEC systems

SystemPools, Tanks & Water-Retaining StructuresSystemInternal Wet Area WaterproofingSystemBalcony & Podium Waterproofing (Under Tile or Screed)SystemTile Adhesives, Grouts & Sealants
● On site

How to apply ACTFLEX BIOSET

  1. 01

    Prepare

    Substrate sound, rigid, clean and dry. Concrete, renders and screeds cured at least 7 days. Membranes fully cured per their TDS, clean and free of contamination.

  2. 02

    Mix

    Water first, 5.0–5.5 L per 20 kg bag, then powder. Mix at 600 rpm or less for at least 3 minutes. Stand 5 to 10 minutes, then re-mix 1 minute with no extra water.

  3. 03

    Fix

    Key the adhesive in with the flat of the trowel, then comb at about 45°. Slide and press each tile, tap it down, and lift tiles now and then to check coverage.

  4. 04

    Cover

    Aim for 100% adhesive coverage. Back-buttering is mandatory for large-format tiles (over 600 mm), external installations and wet areas.

  5. 05

    Joints

    Keep movement joints through the tile bed and finish. Never fill them with adhesive or grout. Seal with ACTFLEX MS PRO or ACTFLEX 75FC.

  6. 06

    Grout

    Grout from 24 hours with a cementitious or epoxy grout. Light foot traffic from 24 hours and full service from 72 hours at 25°C and 50% RH.

A short guide from the data sheet. Read the full ACTFLEX BIOSET TDS before you start.

● Calculator

How many bags of ACTFLEX BIOSET do I need?

Tile adhesive, 20 kg bag

Trowel and tile
Allow for waste

From the TDS coverage table, using the top of each powder range so you do not run short. Your lift checks on site decide coverage, not the maths.

You need

0 bags

 

Send us your job →Download the TDSWhere to buy
Where the figures come from

From the TDS coverage table, using the top of each powder range so you do not run short. Your lift checks on site decide coverage, not the maths.

  • 6 mm notch: 2.9 to 3.3 kg/m² (3.3 used); 6 to 7 m² a bag. TDS-BIOSET, R3, 11 Nov 2026, page 3
  • 10 mm notch: 4.4 to 5.0 kg/m² (5.0 used); 4 to 4.5 m² a bag. TDS-BIOSET, R3, 11 Nov 2026, page 3
  • 12 mm notch: 5.7 to 6.7 kg/m² (6.7 used); 3 to 3.5 m² a bag. TDS-BIOSET, R3, 11 Nov 2026, page 3
  • Large format, back-buttered: 6.7 to 8.0 kg/m² (8.0 used); 2.5 to 3 m² a bag. TDS-BIOSET, R3, 11 Nov 2026, page 3

More: ACTFLEX BIOSET product page · Pools & tanks system · Internal wet areas system · Balconies & podiums system · Tile adhesives system

All calculators →

Drawings for the systems it goes in

FORSPEC standard details as PDF and DXF. Each sheet is a generic detail: the specification names the products.

2 detailsPools & tanks13 detailsInternal wet areas1 detailBalconies & podiums
● Proof

ACTFLEX BIOSET test reports and compliance

AS ISO 13007.2, adhesion (C2)
Certified: 2.194 initial, 1.453 water, 1.771 heat, 1.449 freeze-thaw N/mm²XTecGen Report 571-2
AS ISO 13007.2, deformability (S1)
Certified, 3.270 mm transverse deformationXTecGen Report 571-2
AS ISO 13007.2, open time
Certified, 0.856 N/mm² (requirement 0.5 or more)XTecGen Report 571-2
AS ISO 13007.5 over ACTFLEX 989 CWP
All fundamental requirements passed; crack bridging 0.89 mmXTecGen Report 568-2
AS ISO 13007.5 over ACTFLEX 906 WPU
Passed; initial adhesion 1.128, heat-aged 1.293 N/mm²XTecGen Report 569-2
T (reduced slip), E (extended open time)
FORSPEC R&D results to the AS ISO 13007.2 test methodsFORSPEC R&D

Download the reports

ReportACTFLEX BIOSET: test report 568-2 to AS ISO 13007.5 (10/06/2026)ReportACTFLEX 906 WPU: test report 569-2 to AS ISO 13007.5 (10/06/2026)ReportACTFLEX BIOSET: test report 571-2 to AS ISO 13007.2 (06/05/2026)CertACTFLEX BIOSET low VOC certificate

Results as stated in the data sheet, TDS-BIOSET · Revision 3 · 11 November 2026. Warranty up to 25 years, depending on the system: ask FORSPEC which term applies to your system.

● Questions

ACTFLEX BIOSET questions

Can I tile straight onto ACTFLEX 989 CWP?

Yes. BIOSET is system-tested over ACTFLEX 989 CWP and 906 WPU to AS ISO 13007.5, with no primer and no slip layer. The membrane must be fully cured per its TDS and clean first.

How much BIOSET do I need?

Typically 6 to 7 m² per 20 kg bag with a 6 mm notch, 4 to 4.5 m² with 10 mm and 3 to 3.5 m² with 12 mm. Large format, back-buttered: 2.5 to 3 m². Coverage is always set by AS 3958:2023.

How much water do I add?

5.0 to 5.5 L of clean water per 20 kg bag. Measure the water into the vessel first, then add the powder. Never overwater and never add water after slaking.

How long before I can grout?

From 24 hours at 25°C and 50% RH, using a cementitious or epoxy grout. It takes longer in cold or humid conditions. Full service is from 72 hours.

Do I need to back-butter?

Yes for large-format tiles (over 600 mm), external installations and wet areas. 100% adhesive coverage is required, checked by lifting tiles.

Is the T and E class certified?

No. C2 and S1 are certified (Report 571-2). T (reduced slip) and E (extended open time) are manufacturer classifications, with accredited verification scheduled.

● Documents

ACTFLEX BIOSET TDS and SDS

TDSACTFLEX BIOSET technical data sheet (Rev 3 · 11/11/2026)SDSACTFLEX BIOSET safety data sheet (Rev 2 · 06/04/2026)ReportACTFLEX BIOSET: test report 568-2 to AS ISO 13007.5 (10/06/2026)ReportACTFLEX 906 WPU: test report 569-2 to AS ISO 13007.5 (10/06/2026)
Show all 6 documents ↓
ReportACTFLEX BIOSET: test report 571-2 to AS ISO 13007.2 (06/05/2026)CertACTFLEX BIOSET low VOC certificate

Always work from the current data sheet. Every FORSPEC TDS and SDS →

Specify it. Or buy it.

Send the drawings or photos and FORSPEC comes back with the system, the details and the quantities. Or find a FORSPEC stockist for ACTFLEX BIOSET.

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